Multistage membrane separation device for helium extraction

Abstract

The utility model belongs to the technical field of separation, and particularly relates to a multistage membrane separation device for helium extraction, which comprises a primary membrane separator and a gas inlet pipe, and a separation mechanism and a mixing mechanism are arranged on the side edge of the primary membrane separator. According to the multistage membrane separation device for helium extraction, the separation mechanism is arranged, so that the membrane separation working pressure reaches a proper degree, the raw material natural gas does not need to be decompressed, the pressure of the natural gas is reduced in the helium extraction process, the natural gas is not consumed, the output of the natural gas is not influenced, the investment is greatly reduced, and the operation cost is lower; the problems that in the extraction process of a device provided in the background art, due to the fact that the helium content in helium-containing natural gas is low, helium is extracted from helium purely through a cryogenic technology, and the energy consumption of non-helium components such as methane is huge are solved, by arranging a mixing mechanism, in the catalytic dehydrogenation process, a dehydrogenation agent and helium can be fully mixed, and the energy consumption is greatly reduced. The dehydrogenation efficiency is improved, and the mixing mechanism is simple in structure and easy to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of separation, in particular to a multi-stage membrane separation device for helium extraction. Background Art

[0002] At present, the industrial production of pure helium mainly adopts the method of deep cold separation of liquid air or natural gas, which has high requirements on equipment and consumes a lot of energy.

[0003] Currently, a separation device has been developed that uses a PET film to separate helium from natural gas. However, the PET films in these devices are mostly fixed to the pipeline using high-sealing fixings, which makes disassembly more troublesome. When the PET film needs to be cleaned, the high-sealing fixings need to be removed. However, since the PET film itself is relatively fragile, the PET film itself will be damaged during the disassembly process, which will affect its use.

[0004] A membrane separation device for helium extraction is proposed in the patent document with publication number CN219663321U, the device includes a separation device body, a disassembly plate is arranged on one side of the separation device body, the upper and lower ends of the disassembly plate are fixedly connected to limit plates, one side of the limit plate is provided with a storage groove, one end of the storage groove is provided with a positioning groove on the surface of the separation device body, the two limit plates are both connected to the separation device body through the provided limit mechanism, one side of the disassembly plate is fixedly connected with a rubber sealing plate that penetrates the separation device body and is tightly sleeved with the penetration part, one side of the rubber sealing plate is provided with three placement grooves, a pull handle is slidably connected inside the placement groove, one end of the pull handle is fixedly connected to a square membrane frame, and a PET film is fixedly connected inside the square membrane frame. The membrane separation device for helium extraction of the utility model is convenient for the staff to disassemble and clean the PET film, and avoids the trouble of disassembly that easily damages the PET film and affects the subsequent use.

[0005] However, during the extraction process, due to the low helium content in natural helium-containing materials, extracting helium from them using only cryogenic technology consumes huge amounts of energy on non-helium components such as methane.

[0006] To this end, we urgently need to provide a multi-stage membrane separation device for helium extraction. Utility Model Content

[0007] The utility model aims to provide a multi-stage membrane separation device for helium extraction, so as to solve the problem that in the extraction process of the device proposed in the above background technology, due to the low helium content in natural helium-containing materials, huge energy consumption is consumed on non-helium components such as methane when helium is extracted from them by simply using cryogenic technology.

[0008] To achieve the above objectives, the utility model provides the following technical solutions: a multi-stage membrane separation device for helium extraction, comprising a primary membrane separator and an air inlet pipe, wherein the air inlet pipe is connected to the air inlet end of the primary membrane separator, and a separation mechanism and a mixing mechanism are arranged on the side of the primary membrane separator.

[0009] The separation mechanism includes a primary compressor, a catalytic dehydrogenation component, a decarbonization component, a secondary membrane separator, a natural gas compressor, a first buffer tank, a secondary compressor, a third-stage first-stage membrane separator, a third-stage second-stage membrane separator, a Roots blower, a second buffer tank, a crude helium compressor, a fine dehydrogenation component, a pressure swing adsorption component and a circulation pipe, wherein the primary compressor is connected to one side of the primary membrane separator, the catalytic dehydrogenation component is connected to the side of the primary compressor, the decarbonization component is connected to the side of the catalytic dehydrogenation component, the secondary membrane separator is connected to the side of the decarbonization component, and the natural gas compressor is connected to one side of the decarbonization component. side, the first buffer tank is connected to the side of the secondary membrane separator, the secondary compressor is connected to one end of the first buffer tank, the three-stage one-stage membrane separator is connected to one end of the secondary compressor, the three-stage two-stage membrane separator is connected to one side of the three-stage one-stage membrane separator, the Roots blower is connected to one end of the three-stage two-stage membrane separator, the second buffer tank is connected to the other end of the secondary compressor, the crude helium compressor is connected to the side of the second buffer tank, the fine dehydrogenation assembly is connected to the side end of the crude helium compressor, the pressure swing adsorption assembly is connected to the side of the fine dehydrogenation assembly, and the circulation pipe is connected to the connection end of the pressure swing adsorption assembly.

[0010] Preferably, the mixing mechanism includes a driving motor, a fixing bolt, a mounting rod and a mixing plate, the driving motor is arranged at the top of the catalytic dehydrogenation component, the fixing bolt is connected to the fixed end of the driving motor, the mounting rod is connected to the rotating end of the driving motor, and the mixing plate is fixedly mounted on the outer wall of the mounting rod.

[0011] Preferably, the catalytic dehydrogenation component is connected to the connecting end of the decarbonization component through a connecting pipe, so that the dehydrogenated helium can be transported to the interior of the decarbonization component for decarbonization, and the secondary membrane separator is connected to the first buffer tank through a delivery pipe, so that the decarbonized helium can be transported to the interior of the first buffer tank.

[0012] Preferably, the secondary compressor is connected to the three-stage one-stage membrane separator through a transmission pipe, thereby performing secondary membrane separation on the helium, thereby improving the separation efficiency. The three-stage one-stage membrane separator is also connected to the three-stage two-stage membrane separator through a transmission pipe, thereby further improving the helium membrane separation effect.

[0013] Preferably, the other end of the Roots blower connection end is connected to the connection between the first-stage compressor and the catalytic dehydrogenation component, so as to achieve the effect of continuous membrane separation, reduce the cost of helium extraction, improve the efficiency, and thus significantly increase the amount of available helium-containing natural gas resources.

[0014] Preferably, the fine dehydrogenation component is connected to the pressure swing adsorption component through a gas pipeline, and the fine dehydrogenation component further performs dehydrogenation, thereby improving the efficiency of dehydrogenation. The other end of the circulation pipe is connected to the connection between the first-stage membrane separator and the first-stage compressor, thereby reducing the operating cost of the device, increasing the separation efficiency, and reducing the overall energy consumption.

[0015] Preferably, the driving motor is connected to the top of the catalytic dehydrogenation component by a fixing bolt, which facilitates the installation and disassembly of the driving motor and makes it more firmly fixed. The mixing plates are staggered on the outer wall of the mounting rod, which facilitates the mixing of the dehydrogenant and the separated helium, thereby improving the efficiency of membrane separation.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The multi-stage membrane separation device for helium extraction, by setting a separation mechanism, makes the membrane separation working pressure reach a suitable level, so that the raw natural gas does not need to be decompressed, the natural gas pressure drops during the helium extraction process, and there is no loss of natural gas, which does not affect the export of natural gas, and the investment is greatly reduced, and the operating cost is lower, which solves the problem mentioned in the background technology that during the extraction process of the device, due to the low helium content in helium-containing natural gas, huge energy consumption on non-helium components such as methane is consumed simply by using deep cooling technology to extract helium from it.

[0018] 2. The multi-stage membrane separation device for helium extraction can fully mix the dehydrogenant and helium during the catalytic dehydrogenation process by providing a mixing mechanism, thereby improving the dehydrogenation efficiency. The mixing mechanism has a simple structure and is relatively easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a rear view structural schematic diagram of the utility model;

[0021] Figure 3 It is a schematic diagram of the oblique structure of the utility model;

[0022] Figure 4 It is a schematic diagram of the structure of the mixing mechanism of the utility model.

[0023] In the figure: 1. primary membrane separator; 2. air inlet pipe; 301. primary compressor; 302. catalytic dehydrogenation assembly; 303. decarbonization assembly; 304. secondary membrane separator; 305. natural gas compressor; 306. first buffer tank; 307. secondary compressor; 308. third-stage first-stage membrane separator; 309. third-stage second-stage membrane separator; 310. Roots blower; 311. second buffer tank; 312. crude helium compressor; 313. fine dehydrogenation assembly; 314. pressure swing adsorption assembly; 315. circulation pipe; 401. drive motor; 402. fixing bolt; 403. mounting rod; 404. mixing plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-Figure 4 , the utility model provides a technical solution:

[0026] Embodiment 1:

[0027] A multi-stage membrane separation device for helium extraction comprises a primary membrane separator 1 and an air inlet pipe 2. The air inlet pipe 2 is connected to the air inlet end of the primary membrane separator 1. A separation mechanism and a mixing mechanism are arranged on the side of the primary membrane separator 1.

[0028] The separation mechanism includes a primary compressor 301, a catalytic dehydrogenation component 302, a decarbonization component 303, a secondary membrane separator 304, a natural gas compressor 305, a first buffer tank 306, a secondary compressor 307, a third-stage first-stage membrane separator 308, a third-stage second-stage membrane separator 309, a Roots blower 310, a second buffer tank 311, a crude helium compressor 312, a fine dehydrogenation component 313, a pressure swing adsorption component 314 and a circulation pipe 315. The primary compressor 301 is connected to one side of the primary membrane separator 1, the catalytic dehydrogenation component 302 is connected to the side of the primary compressor 301, and the catalytic dehydrogenation component 302 is connected to the connecting end of the decarbonization component 303 through a connecting pipe, so that the primary compressor 301 can be connected to the secondary membrane separator 304. The dehydrogenated helium is transported to the decarbonization component 303 for decarbonization. The decarbonization component 303 is connected to the side of the catalytic dehydrogenation component 302. The secondary membrane separator 304 is connected to the side of the decarbonization component 303. The secondary membrane separator 304 is connected to the first buffer tank 306 through a delivery pipe, and then the decarbonized helium is transported to the first buffer tank 306. The natural gas compressor 305 is connected to one side of the decarbonization component 303. The first buffer tank 306 is connected to the side of the secondary membrane separator 304. The secondary compressor 307 is connected to one end of the first buffer tank 306. The secondary compressor 307 is connected to the third-stage membrane separator 308 through a delivery pipe, so as to perform secondary membrane separation on the helium. , which improves the separation efficiency. The three-stage first-stage membrane separator 308 is connected to one end of the two-stage compressor 307. The three-stage first-stage membrane separator 308 is also connected to the three-stage second-stage membrane separator 309 through a conveying pipe, thereby further improving the helium membrane separation effect. The three-stage second-stage membrane separator 309 is connected to one side of the three-stage first-stage membrane separator 308. The Roots blower 310 is connected to one end of the three-stage second-stage membrane separator 309. The other end of the connection end of the Roots blower 310 is connected to the connection between the first-stage compressor 301 and the catalytic dehydrogenation component 302, thereby achieving the effect of continuous membrane separation, reducing the helium extraction cost and improving the efficiency, thereby significantly increasing the amount of helium-containing natural gas resources that can be used. The second buffer tank 311 is connected to the other end of the secondary compressor 307, the crude helium compressor 312 is connected to the side of the second buffer tank 311, the fine dehydrogenation component 313 is connected to the side end of the crude helium compressor 312, the fine dehydrogenation component 313 is connected to the pressure swing adsorption component 314 through the gas pipeline, the fine dehydrogenation component 313 further dehydrogenates, and the dehydrogenation efficiency is improved. The pressure swing adsorption component 314 is connected to the side of the fine dehydrogenation component 313, the circulation pipe 315 is connected to the connection end of the pressure swing adsorption component 314, and the other end of the circulation pipe 315 is connected to the connection between the primary membrane separator 1 and the primary compressor 301, thereby reducing the operating cost of the device, increasing the separation efficiency, and reducing the overall energy consumption.

[0029] Embodiment 2:

[0030] On the basis of Example 1: the mixing mechanism includes a driving motor 401, a fixing bolt 402, a mounting rod 403 and a mixing plate 404. The driving motor 401 is arranged at the top of the catalytic dehydrogenation component 302. The driving motor 401 is connected to the top of the catalytic dehydrogenation component 302 through the fixing bolt 402, which is convenient for installing and disassembling the driving motor 401 and also makes it more firmly fixed. The fixing bolt 402 is connected to the fixed end of the driving motor 401, and the mounting rod 403 is connected to the rotating end of the driving motor 401. The mixing plate 404 is fixedly installed on the outer wall of the mounting rod 403, and the mixing plates 404 are staggered on the outer wall of the mounting rod 403, which is convenient for mixing the dehydrogenant with the separated helium, thereby improving the efficiency of membrane separation.

[0031] When in use, the helium-containing natural gas enters the primary membrane separator 1 through the air inlet pipe 2 for preliminary membrane separation, enters the primary compressor 301 for compression, and then enters the catalytic dehydrogenation component 302 for dehydrogenation treatment. The driving motor 401 is used to rotate the mounting rod 403, so that the mixing plate 404 fully mixes the helium and the dehydrogenation agent, thereby improving the dehydrogenation efficiency. The helium after dehydrogenation enters the decarbonization component 303 for decarbonization, and then passes through the secondary membrane separator 304 for further separation. After separation, it enters the first buffer tank 306, is compressed by the secondary compressor 307, and the helium-containing product is transported to the third-stage first-stage membrane separator 308 and the third-stage second-stage membrane separator 309 for further membrane separation, thereby improving the separation efficiency. Under the operation of the Roots blower 310, the helium-containing natural gas can be continuously membrane separated, further improving the efficiency of membrane separation. After being processed by the crude helium compressor 312 and the fine dehydrogenation component 313, a new technical means is provided for the extraction and utilization of helium, opening up a new situation for the extraction and utilization of helium. The cost of helium extraction is reduced and the efficiency is improved.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A multi-stage membrane separation device for helium extraction, comprising a primary membrane separator (1) and an air inlet pipe (2), wherein the air inlet pipe (2) is connected to the air inlet end of the primary membrane separator (1), characterized in that: The first-stage membrane separator (1) is provided with a separation mechanism and a mixing mechanism on its side; The separation mechanism comprises a primary compressor (301), a catalytic dehydrogenation component (302), a decarbonization component (303), a secondary membrane separator (304), a natural gas compressor (305), a first buffer tank (306), a secondary compressor (307), a third-stage first-stage membrane separator (308), a third-stage second-stage membrane separator (309), a Roots blower (310), a second buffer tank (311), a crude helium compressor (312), a fine dehydrogenation component (313), a pressure swing adsorption component (314) and a circulation pipe (315), wherein the primary compressor (301) is connected to one side of the primary membrane separator (1), the catalytic dehydrogenation component (302) is connected to one side of the primary compressor (301), the decarbonization component (303) is connected to one side of the catalytic dehydrogenation component (302), the secondary membrane separator (304) is connected to one side of the decarbonization component (303), and the natural gas compressor (305) is connected to the first buffer tank (306). On one side of the decarbonization component (303), the first buffer tank (306) is connected to the side of the secondary membrane separator (304), the secondary compressor (307) is connected to one end of the first buffer tank (306), the three-stage one-stage membrane separator (308) is connected to one end of the secondary compressor (307), the three-stage two-stage membrane separator (309) is connected to one side of the three-stage one-stage membrane separator (308), the Roots blower (310) is connected to one end of the three-stage two-stage membrane separator (309), the second buffer tank (311) is connected to the other end of the secondary compressor (307), the crude helium compressor (312) is connected to the side of the second buffer tank (311), the fine dehydrogenation component (313) is connected to the side of the crude helium compressor (312), the pressure swing adsorption component (314) is connected to the side of the fine dehydrogenation component (313), and the circulation pipe (315) is connected to the connection end of the pressure swing adsorption component (314).

2. A multi-stage membrane separation device for helium extraction according to claim 1, characterized in that: The mixing mechanism comprises a driving motor (401), a fixing bolt (402), a mounting rod (403) and a mixing plate (404); the driving motor (401) is arranged at the top of the catalytic dehydrogenation component (302); the fixing bolt (402) is connected to the fixed end of the driving motor (401); the mounting rod (403) is connected to the rotating end of the driving motor (401); and the mixing plate (404) is fixedly mounted on the outer wall of the mounting rod (403).

3. A multi-stage membrane separation device for helium extraction according to claim 1, characterized in that: The catalytic dehydrogenation component (302) is connected to the connecting end of the decarbonization component (303) via a connecting pipe, and the secondary membrane separator (304) is connected to the first buffer tank (306) via a conveying pipe.

4. The multi-stage membrane separation device for helium extraction according to claim 1, characterized in that: The secondary compressor (307) is connected to the three-stage first-stage membrane separator (308) through a transmission pipe, and the three-stage first-stage membrane separator (308) is also connected to the three-stage second-stage membrane separator (309) through a transmission pipe.

5. The multi-stage membrane separation device for helium extraction according to claim 1, characterized in that: The other end of the connection end of the Roots blower (310) is connected to the connection point between the primary compressor (301) and the catalytic dehydrogenation component (302).

6. The multi-stage membrane separation device for helium extraction according to claim 1, characterized in that: The fine dehydrogenation component (313) is connected to the pressure swing adsorption component (314) via a gas transmission pipe, and the other end of the circulation pipe (315) is connected to the connection between the first-stage membrane separator (1) and the first-stage compressor (301).

7. The multi-stage membrane separation device for helium extraction according to claim 2, characterized in that: The driving motor (401) is connected to the top of the catalytic dehydrogenation assembly (302) via a fixing bolt (402), and the mixing plate (404) is staggered and distributed on the outer wall of the mounting rod (403).

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